Communication is one of the key factors that affect relationships and it is also one of the basic stuff over which a relationship is built. It also one of the key things that can ruin a relationship, if not used effectively.
One of the ways to ruin your communication is to communicate aggressively. This is one of the common modes of communication that most people choose when they are angry or unhappy about the behaviour of their partner. The consequence is that they either choose words or mean something in a way that they destroy the self esteem or the dignity of their partner.
Words once told can never be got back and whatever you do later will never erase what you told. For the person who is aggressively communicating, this is to vent their anger, but this will eventually ruin a relationship. More importantly, to get to the point of this topic, while in anger it is impossible to state clearly what you mean.
Another aspect that ruins your relationship is a complaining communication. That is, if you are in a trouble or unhappy about something and if you start your conversation just with what you are unhappy about and talk, talk and talk about all the things that you are unhappy about. Now this is the point where you tamper with your relationship.
Always start with positive things and things you are happy about. Then try to blend in some of the complaints that you might have and that you might want to fix. Always a balance is essential to get things done. This way, you will make yourself clear. If not, your point will just be immersed in a sea of complaints and blabbering and your partner will be thinking about beer and a night out by this time!